Help Needed    Cxn With adi 2 dac fs

I normally use adi 2 dac with laptop.
I thought I might try it with my cxn.  Coax out from cxn.  All works fine.

Now the cxn converts all data to 384khz.  When I play a dsd64 the cxn converts to pcm 174khz  all fine there.
The cxn can output coax at a max of 192khz.  I decided to see if the cxn can output dop at the 176khz coax out.
And it seems to work But....... the adi says DSD 24bits.  It seems that the cxn is converting to pcm
While retaining dsd header,  it’s puzzling me. 
When I play from USB. Adi tells me DSD.   

Why is it showing 24bit from coax out from cxn???  Anyone